I have had my new 350 for about 3 weeks now and couldn't be happier. Black/Black, with Navigation and everything except the extended sunroof, chrome wheels, and mark levinson.
The car does everything for you once it is set-up. Ex (Rain sensing wipers, auto headlights, auto rearview mirror glare control, key fob access & start, auto climate control, seats, etc. etc. There are so many little things that make the experience of driving totally stress free. My favorite is the air conditioned seats... OMG!!! no more sweaty back and butt.
Regarding performance, the car is a smooth riding cruiser with plenty of power to pass anyone on the road. I haven't really pushed it yet because it's not broken in, but it definetley has a sweet spot on the highway at 60 mph and at 80 mph. The car just wants to go and you dont even feel like your going fast. Gas mileage seems really terrific and all i know is that I use about 3/4 of a single tank a week for everyday commuting and thats with the a/c on and everything.
The other day I had to run an errand and used my girlfriends 2002 Hyundai Elantra. Now I know that this is not comparing apples to apples or even apples to fruit, haha. but I have gotten so used to the Lexus that when I started driving her car, I thought the back window was open. It wasn't, just a really noisy interior. The steering felt like it wasnt even power and at one point I honestly thought the transmission was slipping becuase the engine was reving but I wasnt going anywhere. Just wanted to share that story because it made me miss and appreciate my car that much more.
I honestly love the new ES350 and feel like a fat man that hit the lottery when I drive it, because it pampers me everywhere I need to go.
:D